About the preferred wireless network list
.................................................................................................................................................................................................
216
Add a wireless network to the preferred wireless network list
..............................................................................................................................................................
216
Change the order of preferred wireless networks
....................................................................................................................................................................................
217
Delete a wireless network from the preferred wireless network list
.....................................................................................................................................................
217
Turn off data service
......................................................................................................................................................................................................................................
217
About roaming
...............................................................................................................................................................................................................................................
218
Switch wireless networks manually
............................................................................................................................................................................................................
218
Verify the status of network connections and services
...........................................................................................................................................................................
218
Wireless network coverage troubleshooting
.............................................................................................................................................................................................
218
Power, battery, and memory
............................................................................................................................................................................................................
221
Turn off your device
.......................................................................................................................................................................................................................................
221
Set your device to turn on and turn off automatically
.............................................................................................................................................................................
221
Check the battery power level
.....................................................................................................................................................................................................................
221
Check the battery power level using a voice command
............................................................................................................................................................................
41
Reset the device
.............................................................................................................................................................................................................................................
221
Extend battery life
.........................................................................................................................................................................................................................................
221
View the amount of available memory on your device
...........................................................................................................................................................................
222
Best practice: Optimizing your device performance
...............................................................................................................................................................................
222
SIM card
...............................................................................................................................................................................................................................................
223
About the SIM card phone book
.................................................................................................................................................................................................................
156
Add a contact to your SIM card
.................................................................................................................................................................................................................
156
Copy contacts from your SIM card to your address book
.......................................................................................................................................................................
156
Copy a contact from your address book to your SIM card
......................................................................................................................................................................
156
Change a SIM card contact
..........................................................................................................................................................................................................................
157
Delete a SIM card contact
............................................................................................................................................................................................................................
157
Store SMS text messages on your SIM card
...............................................................................................................................................................................................
79
About SIM card security
..............................................................................................................................................................................................................................
224
Protect your SIM card with a PIN code
.....................................................................................................................................................................................................
225
Change the SIM card PIN code
..................................................................................................................................................................................................................
225
Change the display name for a phone number
........................................................................................................................................................................................
225
Security
................................................................................................................................................................................................................................................
227
Security basics
...............................................................................................................................................................................................................................................
227
Password keeper
...........................................................................................................................................................................................................................................
228
Encryption
......................................................................................................................................................................................................................................................
230
Memory cleaning
..........................................................................................................................................................................................................................................
232
Certificates
....................................................................................................................................................................................................................................................
233
Certificate servers
........................................................................................................................................................................................................................................
239
Key stores
.......................................................................................................................................................................................................................................................
241
Smart cards
....................................................................................................................................................................................................................................................
243